This web app exists to make long-run UK living costs more intuitive by re-pricing everyday goods and services in multiple “money lenses” (nominal pounds, real pounds, gold, hours worked, market bitcoin, and Bitcoin’s power-law price). The goal is to show how the same item can look very different depending on the unit of account, and to illustrate changes in purchasing power over time rather than just headline prices.

• Coverage is annual 1950–2025 for all items and all denominators except Bitcoin-derived series, which begin after Bitcoin’s market launch years.
• Denominators include nominal GBP, CPI-adjusted real GBP ?, gold, hours worked at median wage, market bitcoin, and Bitcoin’s power-law price.
• The Bitcoin power-law denominator uses Santostasi & Perrenod’s A Mechanistic Derivation of the Bitcoin Price Power Law: Network Adoption Dynamics and Generalised Metcalfe Scaling, averaging the paper’s fitted daily formula into annual GBP/BTC values. It prices in Bitcoin while smoothing out most market-cycle volatility; the existing market Bitcoin series remains available separately.
• Where official annual series begin after 1950, the app back-casts earlier years using CPI-adjusted anchor points and conservative real-trend assumptions; inspect each card’s source notes before drawing strong conclusions.
• Point colours follow source confidence metadata: high (official/statutory), medium (benchmark market + standard transformations), low (proxy reconstruction).
• Added commodities: copper, silver, and Brent crude oil, each with annual points through the full range.
• Most values are nominal unless the “Real GBP” denominator is selected.
• Sources include official, market, and derived series with lineage notes in the app.